PRODUCT INFORMATION
INDEX
DATE
Dep. 2
IC-C-D-40-003e A
May 2012
OXIDATIVE CATALYTIC CONVERTERS
2/6
The conversion efficiency of this type of oxidative catalytic converter is shown in the following table:
NOx
CO
NMHC VOC CH2O HAPs
Null
70-95% 40-90% 60-99% 60-99% 60-99%
NMHC: Hydrocarbons (no methane)
VOC: Volatile Organic Compounds.
CH2O: Formaldehydes.
HAPs: Polycyclic aromatic hydrocarbons.
Table 2. Reduction efficiencies of each contaminant in an oxidative catalytic converter.
Oxidative catalytic converter
A,B: Lid
C: Gaskets
D: retaining system
E: Catalyst element
Fig. 1 Parts of an oxidative catalytic converter.
2. ENGINE OPERATION
The way in which an engine with an oxidative catalytic converter is operated may cause it not to work properly or
even damage or disable it The following requirements should thus be taken into account when operating the
engine-catalytic converter unit.
-
The engine must be operated and maintained in accordance with the manufacturer’s specifications.
-
Maximum inlet temperature to the catalytic converter 600°C.
-
Special lubricating oil with less than 0.6% weight of sulphated ash as an additive of the same must be used.
Zinc content must be less than 900ppm and phosphorus content less than 400 ppm.
-
Substances deposited on the inner surface of the catalytic converter must not lead to an excessive increase in
the initial load of the catalytic converter, as it would be covering the reaction points and leading to a
progressive reduction in system efficiency. The engine must operate with specific oil consumption in
accordance with IO-G-M-25-001 and IO-F-M-25-001.
-
The engine can operate with or without recirculation of crankcase gases, in accordance with the systems and
specifications defined by the manufacturer.
-
Fuel quality should meet the ASTM D975, ASTM D6751 standards and also have a sulphur content of <500
ppm, chlorine compounds of <10ppm and without the presence of silicon compounds.
Gas inlet
Gas outlet
Emissions sampling
points.
2.7.2
O&M_2.002211.810_A_10_2016
